One user's cron jobs not running
I run a cron job that downloads my Yahoo mail every hour from 8 a.m. to 10 p.m. via the fetchyahoo program. This has been running without problems for over a year now, but suddenly in the past few days it has stopped. I was getting emailed reports each time it ran; now I get nothing. Other cron jobs continue to execute normally (root jobs, mailman). There is no record of errors in any of the cron logs (actually, all of them are empty except for one of them, I think cron.info). I tried changing the user's crontab file and saving it, but, even though it said it was reloading it, nothing changed.
Can anyone give me an idea of how to debug this problem? Where can I look to find out why the cron job is not running?